First, to what extent the behavior during single-cell thermal runaway can be suppressed Second, design of sufficient safety margin to prevent a single-cell ignition event from propagating to the entire pack.

Technologies for Suppressing Thermal Runaway Severity at the Cell Level (Aiming to exceed regulatory and standard test requirements)

Beyond meeting pass criteria where venting/smoke during thermal runaway (e.g., caused by internal short circuit) is acceptable, it is desirable to develop technologies that limit temperature rise to at least 100 °C below the electrolyte ignition temperature (approximately 450 °C)

Preventive Measures Against Pack Ignition/Explosion (to Avoid Risk of Human Injury) (Sufficient safety margin is required)

As a measure to prevent the spread of fire, technology is needed to stop the temperature rise of adjacent cells to 50°C or more below the thermal runaway starting temperature.